Grooving and seaming machine



C. L. RIDGWAY. GROOVING AND SEAMING MACHINE.

Patented Feb, 25, 1896.

UNITED STATES PATENT OFFICE.

CHARLES L. RIDGXVAY, OF BOSTON, ASSIGNOR OF ONE-HALF TO JOHN l3.YVILKINSON, OF EVERETT, MASSACHUSETTS.

GROOVING AND SEAMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 555,335, dated February25, 1896 Application filed May 28, 1894. Serial No. 512,639. (No model.)

To aZZ whom it may concern.-

Be it known that 1, CHARLES L. RIDG\VAY, of Boston, county of Suffolk,State of Massachusetts, have invented an Improvement inGrooving-Machines, of which the following description, in connectionwith the accompanying drawings, is a specification, like let ters andnumerals on the drawings representing like parts.

In metal work, such as tin, sheetiron, &c., it is customary to overturnthe edges to be joined, to leave hooks which are engaged, and then theedges so interlocked are acted upon by a roll which grooves or offsetsone piece of the sheet metal parallel with and close to the interlockededges, and thereafter the metallic article is subjected to the action ofa second roll or to a hammering operation to further set and flatten theseam.

This invention consists in the novel way of sustaining separable andadjustable plates constituting a grooving-wheel;

Figure 1 shows in side elevation a grooving-machine embodyingmyinventi'on Fig.2, a rear side elevation of part of the carriage andgrooving-wheel; Fig. 3, a section in the line to, Fig. 2; Fig. 4, asection in the line as, Fig. 3; Fig. 5, a detail of one end of the axleand collar; and Figs. 6, '7, and 8 show difierent steps of the work tobe done by this machine.

The framework A adapted to be secured to a bench A by a nut A the hornor support B to receive on it the work to be acted upon, the carriage Ohaving a shank B provided with rack-teeth and adapted to be engaged andmoved by the teeth of the gear B (shown by dotted lines) fast on a shaftB having a suitable handle B", the track or guide 0 cmbraced by aloop-like part (J of the head of said carriage, and the roll C are andmaybe all substantially as common in grooving-inachines.

Referring to Fig. 6, let a a represent two pieces of tin or sheet metalhaving their edges inturned or hooked, as usual, preparatory to forminglocked seams in metal for pipes, &c. Fig. 7 shows the same pieces afterthe piece a has been grooved or bent down close to the interlocked edgesso as to keep the edges locked, and in Fig. 8 the interlocked edges areflattened or set.

I will now define my invention, it lying chiefly in a novel constructionof groovingwheel.

The grooving-wheel is composed essentially of three disks 2 3 et and astud or axle d having an eccentric represented as loose thereon, theeccentric being restrained from rotation by slabbing off a part of theshaft or axle at its top side (see Fig. 4) and making the hole in theeccentric fit it. Two of these disks, 2 and at, fit the shaft 5 androtate about it at opposite sides of the eccentric, while the disk 3rotates about the eccentric as its center. One end of the stud or axle dhas an enlarged head (Z (see Figs. 9 and 5) slotted or cut away near oneedge to leave a notch, as at the left in Figs. 2 and 5, and its otherend is threaded to receive a nut e.

The carriage O has connected to it a collar (1 having at its outer sidelocking-notches 7 8 and a pin 18 to enter the notch in the head (1 saidpin limiting the extent of rotation of the stud or axle. The collar (1has at its inner side a pin 20 which connects the collar to thecarriage. The notches 7 and 8 are adapted to be engaged by a lockingdevice, shown as a lever d pivoted at 9 on the head of the stud or axle(I, said lever having a toe 10 to enter one or the other of said.notches 7 or S, according to the position desired for the plate 3 withrelation to plates 2 and 4, said levers being held in one or the otherposition by a suitable spring or device 12.

The stud or axle has fast on it at one end a suitable nut e, and inpractice a'suitable antifriction-washer e is interposed between said nutand carriage.

The eccentric 5 is embraced by the disk 3, and by turning the eccentric,which may be done by engaging the locking device (I and partiallyrotating the stud or aXle (Z, the said disk 3 may be put more or lesseccentric to the disks 2 and at.

lVhen the toe 10 of the locking device engages the notch of the collar(1 the peripheries of the disks may be out of line, as in Fig. 7, aswhen the seam is to be grooved, and when the other notch Sis so engagedthe pc- IOC.

ripheries of the disks will be in line, as in Figs. 3 and 8, as when theseam is to be rolled or pressed down and set, and the change in thedisks of the wheel D for the different purposes may be quickly effected.

By slabbing the stud or axle off at its top side to receive theeccentric and prevent its rotation on said stud or axle, it is possibleto keep the round or circular part of the stud or axle nearest the horn,so as to sustain the upward pressure or strain of the wheel on said studor axle.

It will be understood that the chief pressure of the wheel against thestud or axle is an upward one.

The axle d, with its plates and attachments, may be readily insertedinto any usual grooving-machine for the usual solid wheel and its axle.

Having described my invention, what I claim, and desire to secure byLetters Patent, is

1. In a metalgrooving machine, a horn, a guide, a carriage thereonhaving a toothed shank, and actuating mechanism for said shank, combinedwith a stud or axle, and a separable eccentric slipped thereon,eachhavin g a secant portion to secure the same in immovable relation,substantially as described,

and a roll composed of three plates, two of which embrace said stud oraxle, while the third plate embraces the said separable eccentric, andmeans to partially rotate said stud or axle to move one of said disks onor with relation to the others of said disks by means of said eccentric,substantially as described.

2. In a grooving-machine, the combination with the carriage O, and itsattached collar having notches, of an axle having at one end a head uponwhich is pivoted a locking device having a toe to engage said collar, aseparable eccentric mounted on said axle and restrained from rotationexcept with said axle, and three circular plates, two of said platessurrounding said axle, the third or central plate surrounding saideccentric, whereby the said plates may all be removed by simplywithdrawing said axle longitudinally from said plates and eccentric,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES L. RID GlVAY.

\Vitnesses:

GEO. \V. GREGORY, LAURA MANIX.

